21310112334240 has 144 divisors (see below), whose sum is σ = 73912902224616. Its totient is φ = 5589537638400.

The previous prime is 21310112334209. The next prime is 21310112334307. The reversal of 21310112334240 is 4243321101312.

21310112334240 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 0 + 1 + 1 + 233 + 424 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13544549205264 + 7765563128976 = 3680292^2 + 2786676^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121212891 + ... + 121388570.

Almost surely, 2^{21310112334240} is an apocalyptic number.

21310112334240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21310112334240 is an abundant number, since it is smaller than the sum of its proper divisors (52602789890376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21310112334240 is a wasteful number, since it uses less digits than its factorization.

21310112334240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242601543 (or 242601532 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 21310112334240 its reverse (4243321101312), we get a palindrome (25553433435552).

The spelling of 21310112334240 in words is "twenty-one trillion, three hundred ten billion, one hundred twelve million, three hundred thirty-four thousand, two hundred forty".